[jQuery] Looking for expand/collapse tree directory navigation

[jQuery] Looking for expand/collapse tree directory navigation


Hello,
I'm looking for an expanding/collapsing tree directory type of
navigation and was wondering if someone knows of a good one that's out
there and available.
What I'm specifically looking for is one that is triggered on the
click of a *graphic* that toggles the show/hide. Each text nav item
should be hyperlinkable to it's own link/page. So for example (the +
and - are the collapse/expand graphics, the dot leader is for some
formatting):
- Nav Item 1 (text should be hyperlinkable)
.......Sub Nav 1(text should be hyperlinkable)
.......- Sub Nav 2 (text should be hyperlinkable)
..............Sub Nav 2a (text should be hyperlinkable)
..............Sub Nav 2b (text should be hyperlinkable)
..............Sub Nav 2c (text should be hyperlinkable)
.......Sub Nav 3 (text should be hyperlinkable)
+ Nav Item 2 (text should be hyperlinkable)
+ Nav Item 3 (text should be hyperlinkable)
+ Nav Item 4 (text should be hyperlinkable)
Ideally, this would work for plain old <ul> and <li> structure. I
suppose infinite nesting would be cool, but I don't think I need to go
beyond 3 levels with the first 2 levels having the show/hide graphic
triggers.